test_posixpath.py 文件源码

def test_realpath_symlink_loops(self):
            # Bug #930024, return the path unchanged if we get into an infinite
            # symlink loop.
            try:
                os.symlink(ABSTFN, ABSTFN)
                self.assertEqual(realpath(ABSTFN), ABSTFN)

                os.symlink(ABSTFN+"1", ABSTFN+"2")
                os.symlink(ABSTFN+"2", ABSTFN+"1")
                self.assertEqual(realpath(ABSTFN+"1"), ABSTFN+"1")
                self.assertEqual(realpath(ABSTFN+"2"), ABSTFN+"2")

                self.assertEqual(realpath(ABSTFN+"1/x"), ABSTFN+"1/x")
                self.assertEqual(realpath(ABSTFN+"1/.."), dirname(ABSTFN))
                self.assertEqual(realpath(ABSTFN+"1/../x"), dirname(ABSTFN) + "/x")
                os.symlink(ABSTFN+"x", ABSTFN+"y")
                self.assertEqual(realpath(ABSTFN+"1/../" + basename(ABSTFN) + "y"),
                                ABSTFN + "y")
                self.assertEqual(realpath(ABSTFN+"1/../" + basename(ABSTFN) + "1"),
                                ABSTFN + "1")

                os.symlink(basename(ABSTFN) + "a/b", ABSTFN+"a")
                self.assertEqual(realpath(ABSTFN+"a"), ABSTFN+"a/b")

                os.symlink("../" + basename(dirname(ABSTFN)) + "/" +
                        basename(ABSTFN) + "c", ABSTFN+"c")
                self.assertEqual(realpath(ABSTFN+"c"), ABSTFN+"c")

                # Test using relative path as well.
                with support.change_cwd(dirname(ABSTFN)):
                    self.assertEqual(realpath(basename(ABSTFN)), ABSTFN)
            finally:
                test_support.unlink(ABSTFN)
                test_support.unlink(ABSTFN+"1")
                test_support.unlink(ABSTFN+"2")
                test_support.unlink(ABSTFN+"y")
                test_support.unlink(ABSTFN+"c")
                test_support.unlink(ABSTFN+"a")